Question about XBMC and Streaming to TV

I have read quite a few tutorials and havent had any luck, so i decided to try my luck here, anyways, i was wondering if anoyone knew if there is a way to stream a live feed to your tv or if it actually has to already be on your computer. I have mlb.tv and would like to watch the games on my tv rather than computer, but havent be able to figure it out. I have videoLAN or whatever its called, and i know there is a spot you can type in the url, but when you click on a game you never see the actual address because the game comes up in a pop up window. Any help is appreciated